rtc_event_begin_log.cc

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/*

 *  Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.

 *  Use of this source code is governed by a BSD-style license

 *  that can be found in the LICENSE file in the root of the source

 *  tree. An additional intellectual property rights grant can be found

 *  in the file PATENTS.  All contributing project authors may

 *  be found in the AUTHORS file in the root of the source tree.

*/

#include "logging/rtc_event_log/events/rtc_event_begin_log.h"

#include <cstdint>

#include <string>

#include <vector>

#include "absl/strings/string_view.h"

#include "api/array_view.h"

#include "api/rtc_event_log/rtc_event.h"

#include "api/units/timestamp.h"

#include "logging/rtc_event_log/events/rtc_event_field_encoding.h"

#include "logging/rtc_event_log/events/rtc_event_field_encoding_parser.h"

#include "logging/rtc_event_log/events/rtc_event_log_parse_status.h"

namespace webrtc {

constexpr RtcEvent::Type RtcEventBeginLog::kType;

constexpr EventParameters RtcEventBeginLog::event_params_;

constexpr FieldParameters RtcEventBeginLog::utc_start_time_params_;

RtcEventBeginLog::RtcEventBeginLog(Timestamp timestamp,

                                   Timestamp utc_start_time)

    : RtcEvent(timestamp.us()), utc_start_time_ms_(utc_start_time.ms()) {}

RtcEventBeginLog::RtcEventBeginLog(const RtcEventBeginLog& other)

    : RtcEvent(other.timestamp_us_) {}

RtcEventBeginLog::~RtcEventBeginLog() = default;

std::string RtcEventBeginLog::Encode(rtc::ArrayView<const RtcEvent*> batch) {

  EventEncoder encoder(event_params_, batch);

  encoder.EncodeField(

      utc_start_time_params_,

      ExtractRtcEventMember(batch, &RtcEventBeginLog::utc_start_time_ms_));

  return encoder.AsString();

RtcEventLogParseStatus RtcEventBeginLog::Parse(

    absl::string_view encoded_bytes,

    bool batched,

    std::vector<LoggedStartEvent>& output) {

  EventParser parser;

  auto status = parser.Initialize(encoded_bytes, batched);

  if (!status.ok())

    return status;

  rtc::ArrayView<LoggedStartEvent> output_batch =

      ExtendLoggedBatch(output, parser.NumEventsInBatch());

  constexpr FieldParameters timestamp_params{

      "timestamp_ms", FieldParameters::kTimestampField, FieldType::kVarInt, 64};

  RtcEventLogParseStatusOr<rtc::ArrayView<uint64_t>> result =

      parser.ParseNumericField(timestamp_params);

  if (!result.ok())

    return result.status();

  status = PopulateRtcEventTimestamp(

      result.value(), &LoggedStartEvent::timestamp, output_batch);

  if (!status.ok())

    return status;

  result = parser.ParseNumericField(utc_start_time_params_);

  if (!result.ok())

    return result.status();

  status = PopulateRtcEventTimestamp(

      result.value(), &LoggedStartEvent::utc_start_time, output_batch);

  if (!status.ok())

    return status;

  return RtcEventLogParseStatus::Success();

}  // namespace webrtc